i would think that if you're on t-mobile (like me) you won't have any problems with MMS. it seems that mostly some ATT users are screwed in this regard. and if you have a mac, you can do the JB no problem regardless what carrier you're on.

personally, all i care about is having winterboard working. i'm sure swirlymms will still be ok if i can't get the new one working. and categories of course...